Not a lot happening the last week at night.  There have been a number of storms pushing through and migrants have been hit or miss.   I did find a few great images worth taking a look at.  The first is from last night:

This was taken just before midnight last night--the yellow box shows a storm that had just moved across the lake and Wasatch Mountains.  What followed was a great night of spring migration in Utah.  You can see the green patch just to the right of center as with past nights this has been the route of the heaviest concentration of migrants.  Taking a look at the velocity image that corresponds you can see the opposing movements of the birds and the storm:

The storm was moving east north-east, while the birds were heading north.   If there were only birds or only moisture, usually the velocity shows everything moving one direction.

Finally a couple nights ago (April 29th at 11:58pm) there was a big push of migrants out of the southwest.  I took a screenshot of the region covering the southwest to show something:

The patch marked migrants is from the radar in Las Vegas.  The patch to the north of that and to the right of the arrow pointing out Lytle Ranch is from the Cedar City radar.  The reason I am showing this is to point out why the west desert and southern Utah migrant traps are so phenomenal for migrants and often vagrants.  Birds leaving out of  southern California and Arizona--making their way north out of Mexico that make their way up the west half of Utah don't have a ton of options for places to go during the day.  When first light hits these birds are going to start looking for places to refuel.  

The heavy concentrations of birds to the south of Lytle are going to end up dumping lots of birds into that area, and other  areas in the West Desert.

Keep in mind this isn't every night.  I noticed this as I was checking the previous nights when I was camping on the Beaver Dam Slope to see what was moving--and the radar barely showed anything.

The next couple days are going to bring a mix of clear nights and stormy nights.  It will be interesting to watch the radar and see how and when birds start and stop moving based off the storm fronts as they pass.  I will have a few more updates on nocturnal migration through the middle of the month then I'll give it a rest at least till the fall (probably).

The last week of April the past 6 years I have headed to Washington County to meet the first big wave of northward passerine migrants as they arrive in Utah.  This weekend can bring large numbers of migrants and quite an array of species to the various oases around St. George.  Eastern vagrants are extremely rare this early, but the variety and numbers of birds make it worthwhile.  By now the majority of breeders to the Mojave Desert region are back and already nesting--while several species such as Brown-crested Flycatcher, Lesser Nighthawk, and Blue Grosbeak are still scant.  Each year the birding is different.  In 2007 when I was doing my Utah Big Year migration was in full swing and I picked up just about every usual migrant in the course of a couple days.  The past few years migration has felt a little slower.  There have been plenty of migrants, but nowhere near as heavy.  The last couple years we have seen a later than normal migration in Utah so it’s not surprising that the end of April hasn’t been as great.

Not a Migrant, but this Eurasian Collared-Dove

picture turned out pretty sweet.

Fast forward to this past weekend and it looks like migration is just about on schedule--that being not too early nor late.  Keeping up with tradition my wife and I hit the road Friday night and headed to Washington County.  We left Salt Lake later in the evening to miss the traffic through Utah County Construction.  That put us into St. George just after 11pm, where it was 70 degrees--wonderful!  We made out way out to the Beaver Dam Slope and set up camp above Lytle Ranch on the bluffs overlooking the Beaver Dam Wash.  I sat out enjoying the stars and singing COMMON POORWILLS all around us.  The highlight of the night were 5 or 6 large flocks of shorebirds that came flying over our campsite.  The whistling of their tiny wings and the chattering calls and squeaks were unlike any I have heard before.  I have no idea what species they even were--only that for a half an hour I was in awe of the sounds.

Saturday got a late start as we didn’t leave the tent till 9am.  Winds were thrashing the slope and we didn’t hear much singing.  A couple BLACK-THROATED SPARROWS and House Finches were about it.  We arrived at the ranch where there were more cars than I had ever seen there.  We had brought our dog so we opted to pass the ranch and walk Beaver Dam Creek.  But before we left the parking lot I enjoyed hearing the lovely notes of several SUMMER TANAGER, the melody of a lone HOODED ORIOLE, the chattering of a BULLOCK’S ORIOLE, numerous LUCY’S WARBLERS, and a couple BELL’S VIREO. Spring at Lytle is always a blast.

Lucy's Warbler are everywhere in Washington County in April

We hit the river and slowly made our way up creek about a mile.  This is the equivalent of walking just past the main pond on the ranch property.  There weren’t a ton of birds, but the water felt good on the feet, and I did manage to pick up all 6 species of regular swallows along the way.  I hadn’t been to Lytle since last May--my trip south in January skipped the wash--so all the local species were new year birds.  PHAINOPEPLAS, LADDER-BACKED WOODPECKER, and BLACK-TAILED GNATCATCHER all were brilliant to see for the first time in almost a year.  The surprise of the morning was a WILD TURKEY zipping through the Cottonwoods--apparently there are more than a dozen hanging out on the property now.

Summer Tanager add a splash of color to the desert.

As we neared the gate on our walk back down river we ran into the Sommerfeld’s and Merrill Webb who had seen just about the same birds as us.  It seems like we always see the same faces this time of year down there--if we ran into Rick Fridell it would be a true end of April trip.  Back at the ranch I checked out the Hummingbird feeders and picked up Black-chinned, Costa’s and an ANNA’S HUMMINGBIRD for the year while  WHITE-THROATED SWIFTS chattered overhead, and the tanagers continued to serenade the property.  The group of vehicles was an Audubon event that was scouring the ranch--with so many people around we decided to check out a few other places.

The Beaver Dam Slope

Driving across the slope we didn’t add any new birds for the trip--but at Utah Hill we added the expected BLACK-CHINNED SPARROWS, and a singing GRAY VIREO.  We ended up at Gunlock Reservoir for lunch where a pair of COMMON BLACK-HAWK are nesting again this year.  There reservoir is still full from last years runoff so there was a ton of activity at the inlet where some shallow water persists.  A surprise MUTE SWAN was hanging out here, along with a GREAT EGRET, a couple BLUE-WINGED TEAL, cormorants, White-faced Ibis, Spotted Sandpiper, and Black-necked Stilt.  Singing Rock and Canyon Wren kept us company while we ate as well.

Mute Swan at Gunlock (looks pretty ruffled)

After lunch we hit the usual spots around St. George in Ivins Reservoir, Tonaquint Park, Springs Estate Pond, and the Washington Fields.  Nothing out of the usual at those locations, although the young SNOW GOOSE that was present at Springs Estate in January is still there and all grown up.

Lingering Snow Goose at Springs Estate Pond

After getting our fix of city it was back out to the slope.  We decided to hike Welcome Springs Canyon which was wind free and a great hike to end the afternoon.  Birds were scarce, but a singing BLACK-THROATED GRAY-WARBLER was a new year bird, along with Blue-gray Gnatcatcher, and Bushtit.  The highlight of the trip came when I was watching the swifts and Violet-green Swallows dip and dive in the air above the canyon.  As I was looking up I noticed a very “blunt” looking hawk way up in the thermals.  When I got my binoculars on the birds I was stoked to see a dark adult BROAD-WINGED HAWK.  The only other spring Broad-winged I have seen in Utah was at Lytle Ranch less than 10 miles away--this same weekend in 2007.

Beautiful high flying dark BROAD-WINGED HAWK

We ended the day on the slope where Mockingbirds, CACTUS WRENS, Black-throated Sparrows, Ash-throated Flycatchers, and Western Kingbirds took turns singing for us.  While watching the sun dip over the desert a PRAIRIE FALCON let out a cackle and came curing past our campsite--a first for me on the slope.  It was a clear and calm night--great for camping in southern Utah.

Sunset on the Slope

Sunday morning we were up a little earlier, driving across the slope and adding a GRAY FLCYATCHER hanging out in a Joshua Tree.  Gambel’s Quail were everywhere, and flocks of BREWER’S SPARROWS were also on the move.  As we rolled into the ranch a CRISSAL THRASHER crossed the road.  This time I headed up ranch while Sam walked the dog down river.  It was calm near the camping area but windy in the orchard where I didn’t add any birds--but I did manage a sweet shot of a White-winged Dove.

White-winged Dove at Lytle Ranch

I guess it was an end of April trip though--as I ended up back at the campsite Rick Fridell was hanging out with his family at a camp site.  Rick had seen a handful of empids in the ranch but not much else.  I mentioned that I was surprised that I hadn’t seen or heard any Scott’s Orioles as they are usually quite prevalent by now.  He mentioned that he had heard one singing this morning nearby.  As I left I headed in that direction, and sure enough picked up the SCOTT’S ORIOLE for the trip--and the 3 Oriole Weekend.

Beaver Dam Creek in April

Sam and I headed to the river crossing where we added a couple more birds for the trip in FOY singing PLUMBEOUS VIREO and WESTERN WOOD-PEWEE.  After that we slowly made our way back into town stopping again at Utah Hill adding CASSIN’S KINGBIRD, Lark Sparrow, and Western Scrub-Jay for the trip.

Lark Sparrow at Utah Hill

After having lunch in town we swung by Quail Creek where one COMMON LOON and 5 RED-BREASTED MERGANSERS were both new year birds.  From there we hit the highway and headed north.  We stopped at Chicken Creek Reservoir in Juab County where waterfowl were out in force.  GREATER SCAUP, Bufflehead, and Common Goldeneye were all still present.  The lack of shorebirds was unusual for this date here--no phalarope, peeps, or dowitchers.  There were a few FRANKLIN’S GULLS on the lake as well a couple BONAPARTE’S GULLS.

We opted to skip I-15 through Utah County so we took the west side of Utah Lake.  Near Goshen we saw plenty of HORNED LARKS, and between Elberta and Saratoga Springs we picked up most of the usual raptors including: Red-tailed Hawk, Swainson’s Hawk, Golden Eagle, Northern Harrier, and American Kestrel.

And just like that the weekend was over.  We tallied somewhere around 125 species in the 2 days.  That’s a little lower than normal as we didn’t pack as much birding into the weekend, and skipped out on any high elevation stuff. 150 species is about normal for this weekend.  Rick Fridell mentioned that last year they picked up 165 on their usual Washington County Big Day the last week of April.  If you’ve never been birding in Washington County this time of year, it’s a great time to go and well worth the drive.  It also takes care of having to wait for all those passerine migrants up here in the north!

It's been a wild week of migration to say the least.  The beginning of the week saw our biggest flights of the year, while the middle of the week saw decent flights early in the evening that fizzled out shortly after midnight.  And last night put an exclamation on the week when migration was put to a halt by a large storm passing through northern Utah.

Let's talk about last nights storm:

This was taken just before 10pm as this massive cell passed over the lake.  For several hours it was very windy followed by the thunder, lightning, and then several hours of rain fall.  By about 3 am the storm was mostly cleared out, with the tail end to the east and north of the lake.

Quite the contrast to just a few hours earlier.  Had this storm come through a couple hours earlier or later, migration might have been a very different story last night.  I would expect things to start picking back up tonight, with decent movements as the weekend progresses.

The next three weeks will bring an onslaught of birds through our state as the height of passerine migration hits in mid May (or should hit in mid May).  Shorebird migration should start to slow down after this week.  Typically this last week of April brings in some of the best shorebirding of the year.  The past couple of years shorebird migration has peaked later into May providing great shorebirding through the middle of the month.  Based off current trends I would speculate this year will be more on par with the usual migration patterns and things should start to slow.

Last night was another superb night of migration over northern Utah.  The favorable conditions certainly are lending a hand to keeping things moving.  As I ogled the radar last night it was awesome to watch the stream of birds leaving the north end of the Great Salt Lake and heading off into Idaho.  Large numbers of birds in the 20-25 dBz level could be seen rising then heading north and dispersing.  Based off the density it is presumed that there are approximately 200-600 birds per km cubed where it reaches this amount of reflectivity. (via Clemson BirdRad).

I have put together an animation that starts at 9:00pm last night and lasts 90 minutes.  Check it out:

Just watch for the green to appear around 3:24 UTC and move northward till it blends into the blue around 4:02 UTC.  Pretty cool to see that high density of birds as they move north from the lake and north end of the Wasatch.

I expect there to be a fair number of new shorebird arrivals today given the movements last night.  Plus it's about time for some of the big waves of Yellow-rumped Warblers to be coming through as well.  Yesterday I had my first Yellow Warbler of the year as well as a Lazuli Bunting.  Reports of Bullock's Oriole, Thrushes, and other migrants have also been coming in.

Interestingly last night, I saw what was one of the coolest radar images I can remember.  It was the showing the entire US, and what was cool/odd about it was the fact that the Midwest was exploding with migrants, while the east half of the country looked just like the west half with very little showing up on the radar:

Typically this time of year the entire east looks like the Midwest, but last night migration in the east came to a crawling stop.  This could be in relation to the storm that passed through, but I'm not sure if that is the whole story seeing that everywhere from Florida norther to Maine, and the Carolina's west to Missouri were all effected.  In any event it made for a rather cool radar image--that makes me wish I were birding in Texas today!

If you were looking at the radar last night, you will probably agree that migration is definitely upon us.  It was the first night where we had a fairly decent number of birds moving across northern Utah.  Let's jump right into it and show a screen capture from a few minutes before midnight:

Although we are still on the lighter side of migration, this was by far the heaviest movement of the season mostly between 5-10 dBz.  If you look over the Wasatch range you can see some of the darker blue where there appears to be higher concentrations of birds.  Given that, today would probably be a good day to get out and check your local watering hole, patch of trees, or anywhere else where early songbird migrants, and right on schedule shorebird migrants might be.

Hopefully with a few more days of nice weather we can have a couple more nights like this before the coming storms slow things down.

Over the weekend migration was pretty light, but there was some interesting movement.  Of note was the fact that there was a stream of higher reflectivity over the Wasatch Mountains both Friday and Saturday Night.  In the image below (Saturday at 11:54pm) the area surrounded in yellow has a distinct north south line of blue.  The browns over most of the image are very low density objects--often associated with being insects, dust or other objects.

On both nights around 10pm the radar was a little more interesting when what appeared to be large numbers of birds leaving the north end of the Great Salt Lake and the Wasatch Range showed up on radar shortly disappearing to the north into Idaho.  Here is an animation from Friday Night between 9 and 10pm:

You can see at the beginning there isn't much happening then all of the sudden the top of the images is filled with blues and greens expanding northward.  By midnight things were rather slow and the radar looked very similar to the one from Saturday night.

Finally, on Thursday night migration in Utah was extremely slow.  I thought with the storms having passed things would pick up quickly--but it took a couple nights to get moving.  However, while we were having a slow night in Utah, that southeast United States was having what they would call a slower than average April night:

We can only dream of nights like that out west.  Happy Migration Everyone.